If senior citizens can’t sign up for Medicare until age 67, many will likely stay on the job longer so they can keep their health insurance. That means it could be tougher for mid-career workers to move up, which in turn could make it harder for younger workers to secure entry-level positions, economists say.

“The only way to free up jobs at the bottom for young people is for older workers to retire,” said Sung Won Sohn, an economics professor at California State University Channel Islands. “No one wants to retire without health care.”